Valve.



PATENTBD JAN. 22, 1907.

J. H. BLEOO. VALVE.

APPLICATION nun APB- 6,-1906.

NVENTOR ATTORNEY WIT/M8358.- gmm Rs co., wAsnnvcrcN, n. c,

more fully UNITED STATES PATENT OFFICE.

JOHN H. BLEOO, OF NEW YORK, N. Y., ASSIGNOR .OF NEW YORK, N. Y.

T O ABRAH AM' B. LEVY,

VALVE.

I No. 841,924.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed April 6, 1906. Serial 310,225.

.18 a specification.

The object of my invention is to provide improved means whereby fluid from a source of pressure may be transmitted at a reduced pressure and the volume of such transmitted fluid may be increased or diminished without thereby materially changing the reduced pressure thereof.

To these ends the invention comprises the novel details of improvement that will be hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompany ing drawings, forming part hereof, wherein Figure 1 is a central section of a valve embodying my invention. Fig. 2 is a plan view thereof, and Fig. 3 is a horizontal section substantially on the line 3 3 in Fig. 1.

As shown in the drawings, the casing of the valve comprises the members 1, 2 and 3, shown attached together by screw-threads, and at 4 is a nut for locking the parts 2 and 3 together. The member 1 is shown provided with extended parts 1, which may be bolted to a support, and said member is provided with a chamber or bore 4, from which a passage 5 leads through the casing. The casing also has a chamber 6, from which a passage 7 leads through the casing. For convenience I have shown the passage 7 leading vertically and horizontally in the member 1.

The passage 5 is to communicate With a source of fluid-pressure, and the passage 7 is to communicate with a pipe, reservoir, or other receptacle for the fluid. Within chamber 4 is j ournaled a plug or cook 8, which has a hollow interior or bore 8 and whosewalls are provided with a plurality of ports 8 8 8 to admit fluid into chamber 4 or the bore 8 from the passage 5 in accordance with the volume desired. The plu 8 is shown rotatively retained within the c amber 4 by a nut 9, and said plug may have a square head 10' to receive a handle for rotating it. The casing has a valve to control the passage 1 1 between chambers 4 and 6, the stem 12 of which valve is shown passing through said passage and guided at its upper end in a socket 8 in plug 8, said valve coacting with a suitable I seat 13. At 14 is a spring located in bore 8, bearing against the valve and against the plug and serving to push said valve to its seat.

On one side of chamber 6 is a diaphragm v15, shown clamped at members 1 and 2, as by an interposed washer 16, to make a fluid-tight joint. On the opposite side of said diaphragm is a spring-pressed plunger 17, guided in bores in members 2 and 3 and the spring 18 also being in said memits edges between the ber 2 and adjustable as to tension by the member 3. The valve-stem 12 normally rests upon the diaphragm 15 and thereby the spring 18 tends to raise the valve from its seat and to compress spring 14.

Assuming that spring 18 isset to the predetermined pressuresay sixty pounds to the square inch-it will raise plunger 17 and lift valve 12 from its seat and then when plug 8 is turned so that one of its ports alines with passage 5 fluid flowing from said passage into fchamber 4 will flow through bore 11 into the f chamber 6, and so long as the pressure in chamber 6 is less than the pressure of spring 18 such fluid will flow freely from chamber 6 through passage 7. When, however, the pressure in chamber 6 exceeds the tension of spring 18, as by reason of charging a pipe or reservoir connected with passage 7, the pressure in chamber 6, actingupon diaphragm 15,

will push the latter downwardly, relieving the upward pressure on valve 12 and spring 14, and the pressure in chamber 4 and sprin 14 will push said valve to its seat and cut 0% further flow into chamber 6 until pressure in chamber 6 is again reduced, whereupon spring 18 will open valve 10, and so on. The pressure flowing from chamber 6 may thus be maintained substantially constant at a reduction below fluid-pressure in chamber 4. In some relations variable quantities of fluid are desired at different times, but at a substantially similar pressure, and by reason of plug 8, with its ports of varying size, it is merely necessary to turn said plug to bring either of the ports 8 8, or 8 in the register with passage 5, which will permit the flow of fluid from said passage into chamber 4 in volumeaccording to the size of the port of said plug being used. Thus with a given mainreservoir pressure maintained in passage 5 and a reduced pressure desired in the part connected with passage "7 the spring 18 can be set to permit the flow of the desired pressure from passage plug 8 without materially altering the pressure of such plug 8 can be set for any of its ports to register With passage 5 and left in such position as long as desired, or said at will to change the volume of fluid flowing through passage 7 in accordance with the;

l gpassage, an inlet into one chamber and an work being carried on.

My improvement will be found advarita-i geous in fluid-pressure brake systems for where a given pres sure in the system is required to be mainrailway cars and trains,

tained and the volume of air flowing to the system is to be altered according to requiremerits.

Having now described my invention, what a I claim is 1. In a valve, the combination of acasing E provided with chambers, and an inlet to one chamber, an outlet from the other chamber and means to limit the pressure of 'fluid 'flowing from said outlet, witha plug in the inletchamber provided with means to a't 'wilil 1pe'r mit more orless fluid to flow into said chambers from said inlet.

2. In a valve, he combination of a casing having chambers, apassage between them, a

valve to control sa d passage, and means 'to operate said valve in accordance with a ,pre determined pressure of fluid in said chaminlet-chamber pro the volume of flu'id bers, with a plug in the vided with means to vary admitted to said chambers.

7, and the volume o'i-such fluid can be controlled at will by turning the flowing fluid. Of course the plug may be shifted I 3. In aval've, the combination Of a casing having chambers, a passage between them, a valve to control said passage, and means to *o'perate said valve in accordance with a predetermined pressure of fluid in said chambers, with a plug provided with ports of varying size to control the volume of fluid admitted to said chambers.

4. In a valve, the combination of a casing having chambers and a communicating-pas sage between them, a valve to control said outlet from the other chamber, a diaphragm on one side of the last-named chamber, a spring and plunger to act with said diajrphragm against pressure in said chamber, said diaphragm acting with said valve, and a ?plug in the inlet-chamber provided with means to regulate the volume of fluid admitted tosaid chamber.

5 in a valve, the combination of a casing having chambers and a communicating-passage 'between them, a valve to control said passage, an inlet into one chamber and an outlet from the other chamber, a diaphragm 'on one side of the last-named chamber, a spring and plunger to act with said diaphragm against pressure in said chamber,

, said diaphragmacting with said valve, and a plug in the inlet-chamber, said plug having ports of varying size to regulate the volume of fluid admitted to the inlet-chamber.

JOHN H. BLEOO.

Witnesses 1. F. Bonita-E, L. -SwIN'r'oN. 

